%table{:align=>'center'}
  %tr
    %th{:align=>'left'}= label_tag :excel, "คะแนนผ่านการทดสอบ ไม่น้อยกว่า"
    %td
      = text_field_tag 'exam_schedule[score_a]', @exam_schedule.score_a, :size=>6
      = hidden_field_tag 'exam_schedule[score_b]', ''
      = hidden_field_tag 'exam_schedule[score_c]', ''
      = hidden_field_tag 'exam_schedule[score_d]', ''
  %tr
    %td{:colspan=>'2', :align=>'center', :height=>'40'}
      = submit_tag 'ตัดเกรด'